Knife



Nov. 22, 1932.

R. E. BROWN KNIFE Filed Jan. 9, 1932 Patented Nov. 22, 1932 PA'TE ROBERT E. BROYVN, OF CLEAN, NEW YORK xnrrn Application filed January 9,1932. serial No. 585,783.

The object of this invention is to provide a knife for use by surgeons in whichblades of various forms .may be interchangeably used upon one handle. A further object of the invention is to provide means whereby,

when a blade is in position upon a handle,

it will be effectually locked in place but may 'be very easily removed tobe sharpened or sterilized or permit different blade to be used. Other objects of the invention will appear incidentally in the course of the following description and the invention resides in certam novel features which Wlll bepar- V ticularly defined in the appended claims.

In the annexed drawing,

V Figure l is a plan view of a knife embo dying the invention,

Fig. 2 is a detail plan view of the bladecarrying end of the handle with a blade in working position thereon, the latch spring being removed and parts being shown in section, 7

Fig. 3 is a view, similar to Fig. 2 but showing the blade in position to be removed.

Fig. 4 is an edge elevation, with parts in a section, on a larger scale,

' Fig. ,5 is an elevation showing a slight modification, I 5

Fig. dis a detail perspective view of a part of the device shown in-Fig. 5, r i

Fig. 7 is a plan view showing a further modification, I

Fig. 8 is an enlarged detail sectionon the line88 of Fig. 7,

Fig. 9 is a detail perspective showing a further modification. V

In carrying out the invention, there is provided a handle 1 which may be of any pre-' ferred form and is illustrated as a flat narrow bar reduced in thickness at one end, as shown at 2, the blade being lntended to be mounted upon the reduced end portion of the handle.

The blade consists of a cutting portion 8 of any desired outline and a shank 4 extending from the cuttingportion in substantial alinement therewith. The shank portion 4 of the blade is provided in its opposite edges with notches 5 and 6 which are spaced apart longitudinally of the blade, as clearly shown in Figs. 2 and 3, and at the inner end of the blade, at that side edge containing thegnotch 6, the shank is formed with a shoulder or tooth, as shown at 7, to be engaged by a latch whereby the blade will be locked in working position. The reduced end portion 2 of the handle carries studs or rivets 8 and 9 which are adapted'to be engaged by the respectlve notches 5 and (3 f the shank and areheaded so as to serve as keepers for the parts carried thereby. A leaf spring 10 18 mounted upon these rivets or studs and is held by the heads of the same to extend longitudinally of the handle member, the inner or free end of the spring being reduced in 1 width, as clearly shown in F l, and terminating in a down turned lug 11 which is adapted to pass through an opening 12 provided therefor in the handle and be engaged by the tooth 7, as shown in Fig. 2, to lock the blade in working position. The lug 11 is constructed with a notch 13 in that edge presented toward the blade and normally this lug is alined with or below the reduced end portion of the handle,

. as shown in Fig. 4, the lug projecting through the blade is in working position, as shown in F igs, l and 2, the rivets or studs 8 and 9 and the lug l1 efiectually preventany movement of the blade. When the blade is to be removed, pressure is exerted upon theprojecting end of the lug 11 to push the same through the opening 12 and cause the notch 13 to aline with the tooth or shoulder 7 of the blade whereupon the blade may be rocked about the stud 8 until the tooth or shoulder 7 has cleared the lug 11 and the notch 6 has moved out of engagement with the stud 9,, as shown in Fig. 3, whereupon the blade may be drawn endwise between the studs or rivets 8 and 9 and withdrawn from the handle. It will be understood that the blade cannot move upwardly away from the handle because the leaf spring or latch 10 disposed over it and held by the heads of the studs or rivets and the spacing of the studsis such that'they effectually resist both endwise and sidewise movement of the shank of the blade until the shank'is releasedfrom the latch. 'A rei. bgndle member and p :wxtremitias may overlapathe' amazement lugs i verse operation will, of course, secure another blade in operative relation to the handle.

In Figs. and 6, I have shown a variation in which the blade is of the same construction as that previously described, but the latch s ring 14 difi'ers from the latch first descri and shown in Figs..1 to 4 by dispensing witlathe lug .1 and having its end turned downwardly to form a tooth or lip which will abut the shoulder or tooth 7 of the blade, as shown in Fig. 6, and thereby locktheblade in place. In this form of the invention, the

opening 12 through the handle member is unnecessary and t e latch may be released from the blade when it is desired to remove thd bladezby pressing the thumbnail-under .theibee end of the latch, or the latch may be made slightly wider than the blade so that ithe finger ofthe operator may be engaged unwvi th the blade.

IniEigsfl and 8,:there is shown a further modification in which the latch is in the ibm-ofiafleaf spring 16 secured upon the rojecting over the reldueed end portion thereof, being provided on its'underside, at its free end, with a beveled lug or detent 17 adapted to abutthe "shoulder oritooth 7 of the blade,.as clearly I 3-, enown in Fig. 8. This latch may be released hpm thefbkaxie by upward pressure. exerted underits latching end, as is obvious.

In Fig.'9, -"I have shown a construction which is somewhat cheaper than :the pred viouely flescribed construction in that the;

"q'ivete or studs 8 and 9 are dispensed with b} and'lugs lfilaretformed on the. opposite edges mflflieihaiidle .member, these lugs :being an- ":mftdl in 'section-so that their upper of-ithe willengage llllt elnotches 5 d1ld-6and-'thereby-retain theblade/in place 3in the sdme manner that the headed .rivets istufls f'perform that function in the ar-" 5. M

ntohown :in Fig. 7.

I In all Fformsofithe invention there is prowideth av removable blade-which 'mayibe very "wily withdrawn from the handle and just las easily placed in operative relation! thereto.

--iHaving ithus described the'invention, I akim,

\ 1. 'iAvknife comprising a handle member, heiflledlstuds disposed upon the handle membenadiarttant-an end thereof and spaced apart 5ft'mnsvaraely and longitudinallyof theihandie; a blade having a-shankprovided with matches initsoppositeside edges adapted yto engagecthe: studs on the handle; the width ofethezshank being less than the distance mibetween-the-studswhereby if theshank be Jacked to a positionwith its-longitudinal right angles to a line connecting the 'etbe'rbliulewmay be; drawn endwise belmeemthe studs, and-.means for loeking the 13'; bhde mponzthezhandle with thefnotches in the latch to lift it from its engagement.

'the shank of the blade engaging the studs on the handle. I

2. A knife comprising a handle member, headed studs on the handle member adjacent an end thereof and spaced apart both longitudinally and transversely of the hanv.dle,,a..blz uleltaving a shank provided in its mpppsitesixleledges with, notches arranged to engage said studs and provided on its inner end with a shoulder, and a latch carried by the handle and having a downturncd portion adapted to engage the shoulder on the "end of t e shank of the blade whereby to lockthe.bladein engagement with the studs on the handle. I

-3.- zAiknife comprising a handle having an o ening", therethrough :near one end, headed studsyonthewhamlle acent said .end and spaced apart both transversely and-longitudirnal'ly.Qf-thmlMHdIe abIade having a shank 'pilovilded in1its opposite .side edges with notches-;to.cn,gage said studs and having a .shoulderatdts inner free end, andaresi lient (latch .carriedebythe handle and having-a downwardly extendingelement to epgage.

across theahoulder on; the blade shankwhereby-t e blade willbe locked in position upon :the handle.

4.- FA .kn'ife comprising a ,handle, headed studs on one side off/the handleadjacent an .end thereof, a blade. having marginal notches to engage said studs and havinga shoulder :ongitsdnnser end, and a; latch securedby the studs. over the blade and having its end engaagkmgrthe shoulderen the inner end-ofthe 5. A knife comprising a handle having a vtsansvorse openingitherethrough, studs on one sideof the handle adjacent an end theremtwbhd aving nwr notches to gage the studs andihaving ashoulderonits 'inner ndnand a Lateh-hel by the studs over the blade and having a dependingdug atits inner endqtoxenga ge across the shoulder on the blade [and pass through theopening in w hel nnd t- 6. A knife comprising a handlehgaving a itramveise rDPQnlD-g therethrough, studs on one side of the handle adj acent an end thereof; a blade having --marginal1;notchesto engage the studs and having a'shoulder on its irm'er end, anda' latch; held by. the l studs over theiblade and having adependinglug at ite-inner end to engage across the shoulder 1 on the blade and passthrough I the opening in 'the" handle, said lug having a notch-in one sidewhich is normally 'below' the blade 'butn aybe caused to register with the shouljder'on' the blade upon upward pressure being Jappliledjtdthe lug whereby the blade may be .r'ocked: to be released.

' .7flA ,k iife comprising a'handle, headed .studs on 'one; side of-the handle,- a blade havingmarginal notches to engage the studs and having a shoulder on its inner end, and a resilient latch secured on the handle and having a dependingdetent at its free end engaging the shoulder on the end of the blade.

ture.

testimony whereof I aflix my signa- ROBERT E. BROW'N. [L. 8.] 

